.NODE

Inserting Characters into a string

Class string provides member functions for inserting characters into a string. Figure 18.8 demonstrates the string insert capabilities.

Figure 18.8. Demonstrating the string insert member functions.

(This item is displayed on pages 898 - 899 in the print version)

 1 // Fig. 18.8: Fig18_08.cpp
 2 // Demonstrating class string insert member functions.
 3 #include 
 4 using std::cout;
 5 using std::endl;
 6
 7 #include 
 8 using std::string;
 9
10 int main()
11 {
12 string string1( "beginning end" );
13 string string2( "middle " );
14 string string3( "12345678" );
15 string string4( "xx" );
16
17 cout << "Initial strings:
string1: " << string1
18 << "
string2: " << string2 << "
string3: " << string3
19 << "
string4: " << string4 << "

";
20
21 // insert "middle" at location 10 in string1
22 string1.insert( 10, string2 ); 
23
24 // insert "xx" at location 3 in string3 
25 string3.insert( 3, string4, 0, string::npos );
26
27 cout << "Strings after insert:
string1: " << string1
28 << "
string2: " << string2 << "
string3: " << string3
29 << "
string4: " << string4 << endl;
30 return 0;
31 } // end main
 
 Initial strings:
 string1: beginning end
 string2: middle
 string3: 12345678
 string4: xx

 Strings after insert:
 string1: beginning middle end
 string2: middle
 string3: 123xx45678
 string4: xx
 

The program declares, initializes and then outputs strings string1, string2, string3 and string4. Line 22 uses string member function insert to insert string2's content before element 10 of string1.

Line 25 uses insert to insert string4 before string3's element 3. The last two arguments specify the starting and last element of string4 that should be inserted. Using string::npos causes the entire string to be inserted.

Introduction to Computers, the Internet and World Wide Web

Introduction to C++ Programming

Introduction to Classes and Objects

Control Statements: Part 1

Control Statements: Part 2

Functions and an Introduction to Recursion

Arrays and Vectors

Pointers and Pointer-Based Strings

Classes: A Deeper Look, Part 1

Classes: A Deeper Look, Part 2

Operator Overloading; String and Array Objects

Object-Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism

Templates

Stream Input/Output

Exception Handling

File Processing

Class string and String Stream Processing

Web Programming

Searching and Sorting

Data Structures

Bits, Characters, C-Strings and structs

Standard Template Library (STL)

Other Topics

Appendix A. Operator Precedence and Associativity Chart

Appendix B. ASCII Character Set

Appendix C. Fundamental Types

Appendix D. Number Systems

Appendix E. C Legacy Code Topics

Appendix F. Preprocessor

Appendix G. ATM Case Study Code

Appendix H. UML 2: Additional Diagram Types

Appendix I. C++ Internet and Web Resources

Appendix J. Introduction to XHTML

Appendix K. XHTML Special Characters

Appendix L. Using the Visual Studio .NET Debugger

Appendix M. Using the GNU C++ Debugger

Bibliography

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C++ How to Program
C++ How to Program (5th Edition)
ISBN: 0131857576
EAN: 2147483647
Year: 2004
Pages: 627
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